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                二叉树                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：128MB</p>			</div>
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                                <h3>题目描述</h3><p><div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">一日ll给dd讲解二叉树的知识：</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><b><span style="font-size: 12pt; line-height: 150%">二叉树t是单个节点或有序对t=(t1,t2)，其中t1是t的左子树，t2是t的右子树，满足t1、t2都是二叉树</span></b></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">定义一种大小比较关系：</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">1. </span><span style="font-size: 12pt; line-height: 150%">单个节点&le;t</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">2. (u1,u2)</span><span style="font-size: 12pt; line-height: 150%">&le;(v1,v2)，当且仅当u1&lt;v1，或u1=v1且u2&le;v2</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">t</span><span style="font-size: 12pt; line-height: 150%">的后继t</span><span style="font-size: 12pt; line-height: 150%">&rsquo;</span><span style="font-size: 12pt; line-height: 150%">为所有大小为|t|的二叉树中，大于t的最小的二叉树(若t是最大的，则t</span><span style="font-size: 12pt; line-height: 150%">&rsquo;</span><span style="font-size: 12pt; line-height: 150%">为最小的)</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">ll</span><span style="font-size: 12pt; line-height: 150%">道：&ldquo;找出t的后继t</span><span style="font-size: 12pt; line-height: 150%">&rsquo;</span><span style="font-size: 12pt; line-height: 150%">，就算你及格了&rdquo;</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">dd</span><span style="font-size: 12pt; line-height: 150%">想了想，给出了答案</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">正当ll准备表扬dd时，dd道：&ldquo;不如把问题变复杂一点吧！&rdquo;</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">定义函数f：</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">1. f(</span><span style="font-size: 12pt; line-height: 150%">单个节点)=0</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">2. f((t1,t2)) = 2^(|t1|+|t2|) + 2^|t2|*f(t1) + f(t2)</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">&ldquo;现在给出f(t)，求f(t</span><span style="font-size: 12pt; line-height: 150%">&rsquo;</span><span style="font-size: 12pt; line-height: 150%">)</span><span style="font-size: 12pt; line-height: 150%">&rdquo;</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">看着ll一脸难色，dd进而道：&ldquo;解决这个问题，就算你及格了</span>&nbsp;<span style="font-size: 12pt; line-height: 150%">&rdquo;</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">ll</span>&nbsp;<span style="font-size: 12pt; line-height: 150%">：- -......</span></div>
<div style="margin: 0cm 0cm 0pt 30pt; line-height: 150%">&nbsp;</div></p><hr/><h3>输入格式</h3><p><div style="margin: 0cm 0cm 0pt 29.9pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">有且仅有一行，包含一个整数f(t)</span></div></p><hr/><h3>输出格式</h3><p><div style="margin: 0cm 0cm 0pt 29.9pt; line-height: 150%"><span style="font-size: 12pt; line-height: 150%">应有且仅有一行，包含一个整数f(t</span><span style="font-size: 12pt; line-height: 150%">&rsquo;</span><span style="font-size: 12pt; line-height: 150%">)</span></div></p><hr/><h3>样例输入</h3><pre>
20
</pre><hr/><h3>样例输出</h3><pre>24</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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